Re: [Qemu-devel] [PATCH v2 03/15] blkdebug: support BDRV_REQ_ALLOCATE

[Eric Blake]

On 06/01/2017 10:14 AM, Anton Nefedov wrote:
> Support the flag if the underlying BDS supports it
> 
> Signed-off-by: Anton Nefedov <address@hidden>
> ---
>  block/blkdebug.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Shouldn't other passthrough drivers (like raw-format.c) make this change
as well?

> 
> diff --git a/block/blkdebug.c b/block/blkdebug.c
> index a5196e8..8b1401b 100644
> --- a/block/blkdebug.c
> +++ b/block/blkdebug.c
> @@ -415,7 +415,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict 
> *options, int flags,
>  
>      bs->supported_write_flags = BDRV_REQ_FUA &
>          bs->file->bs->supported_write_flags;
> -    bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
> +    bs->supported_zero_flags =
> +        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_ALLOCATE) &
>          bs->file->bs->supported_zero_flags;
>      ret = -EINVAL;
>  
> 

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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